A radiographic imaging apparatus comprising: a radiation detector configured to be detachable with respect to a patient platform and detect radiation transmitted through an object in one of a moving image capturing mode and a still image capturing mode; a detection unit configured to detect a shift timing of an image capturing mode; a cooling mechanism configured to cool the radiation detector in one of a first cooling mode and a second cooling mode having a higher cooling capacity than the first cooling mode; and a control unit configured to switch the cooling modes of the cooling mechanism based on detection by the detection unit.